1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Georgia [21]
3 years ago
6

How long does it take for only one eighth of a sample of radon-222 to remain

Chemistry
1 answer:
Alex17521 [72]3 years ago
4 0
1/8=(1/2)^3 and the half life of radon is 3.8days

Half life is the time it takes for half of any amount of a radioactive substance to decay into something else.

Therefore for a sample of radon to decay to 1/8 of its original amount, it would take 3 x 3.8days=11.4 days
You might be interested in
If I initially have a gas at a pressure of 12 kPa, a volume of 23 liters, and a temperature of 200 K, and then I raise the press
sertanlavr [38]

Answer:

The new volume of gas would be 30 L.

Explanation:

This is an example of a Combined Gas Laws problem.

5 0
3 years ago
How many orbitals are contained in the third main energy level and in the fifth energy level
antoniya [11.8K]

There are 9 orbitals in the third energy level and 25 orbitals in the fifth energy level.

I hope this helps you.

5 0
3 years ago
Red #40 has an acute oral LD50 of roughly 5000 mg dye/1 kg body weight. This means if you had a mass of 1 kg, ingesting 5000 mg
FrozenT [24]

Answer:

350 g dye

0.705 mol

2.9 × 10⁴ L

Explanation:

The lethal dose 50 (LD50) for the dye is 5000 mg dye/ 1 kg body weight. The amount of dye that would be needed to reach the LD50 of a 70 kg person is:

70 kg body weight × (5000 mg dye/ 1 kg body weight) = 3.5 × 10⁵ mg dye = 350 g dye

The molar mass of the dye is 496.42 g/mol. The moles represented by 350 g are:

350 g × (1 mol / 496.42 g) = 0.705 mol

The concentration of Red #40 dye in a sports drink is around 12 mg/L. The volume of drink required to achieve this mass of the dye is:

3.5 × 10⁵ mg × (1 L / 12 mg) = 2.9 × 10⁴ L

8 0
3 years ago
Explain what keeps the electrons confined in the space surrounding the nucleus
vitfil [10]

Answer:

Electrons are trapped inside the atom because of the attraction forces with positively charged protons that are found in the nucleus.

8 0
2 years ago
Can someone please help me with this I need help asap
DiKsa [7]

Answer:

???

Explanation:

6 0
2 years ago
Other questions:
  • It takes 26.8 mL of a 0.0700 M NaOH standard solution to neutralize a 250 mL sample of lactic acid (C3H6O3). What mass of lactic
    14·1 answer
  • There are two parts of photosynthesis--the light reactions and the dark reactions. What is the end product of the dark reactions
    15·2 answers
  • 1. Convert 67500 mg to the unit hg
    7·1 answer
  • The Earth, the Sun, and the rest of the solar system are almost unimaginably old when viewed on a human time scale. While modern
    9·2 answers
  • A gas sample occupies a volume of 1.264 L when the temperature is 168.0 °C and the pressure is 946.6 torr. How many molecules ar
    10·1 answer
  • Helpl asap nowwww bc i dont understand
    7·1 answer
  • The same amount of ____ that existed before the change of state
    7·1 answer
  • In our bodies, glucose is broken down into carbon dioxide and water, much like a combustion reaction. How many grams of O2 are n
    7·1 answer
  • 6 Select the correct answer. A substance is followed by the symbol (l) in a chemical equation. What does the symbol represent?
    10·1 answer
  • HELP PLEASE !!!<br> Name the Salt formed When Nitric acid + Magnesium hydroxide
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!